Pump jack



May y'13 1924.

E. W. GROGAN MP JAC Filed March l2, 1923 2 Sheets-Sheet l @hams/4to@ 2 L a @Hoz muy Patented May 13, 1924.

UNITED STATESy EDWARD wenoeAN, or AMARILLO, TEXAS.

PUMP JACK.

Application led March 12, 1923. Serial No. 624,647.

To all 107mm 15' may concern:

Be it known that I, EDWARD W. GROGAN,

a citizen ofthe United States, residing at Amarillo, in the county of Potter and State of Texas, have invented certain new and useful Improvements in Pump Jacks, of which the following is a specification.

The object of my invention is to provide an inexpensive, convenient and pump jack which may be operated upon deep well pumps without requiring a heavy driviing force. The invention is applicable to oil wells and also to pumps operated by windmills or by an engine and may be adjusted so to be operated by hand when the windmill or engine isv being repaired. The inven tion is illustrated in the accompanying drawings andV consists in certain novel features vwhich will be hereinafter fully set forth.

In the drawings:

Figure 1 is a side elevation of my im proved jack showing it arranged for use in connection with a deep well oil pump;

Fig. 2 is asimilar view showing the device arranged to be operated by a windmill;

Fig. 3 is an enlarged detail section on the line 3 3 of Fig. 2, and

Fig. 4 is an enlarged detail sectionr of one 30 of the bearings or connections between the supporting frame and one of the levers.

In carrying out my invention, I employ a platform 1 which may be of any convenient or preferred construction and upon the said platform I erect a rigid frame 2 consisting of upwardly converging standards connected by a brace 3 at their upper ends. The standards are composed of duplicate members and the brace 3 is arranged between the members of the standards, as will be readily understood. Extending between the members of each standard and fulcrumed upon one standard is a lower lever 4 which carries at its forward end a hanger 5, said hanger supporting a clamp 6 which is secured to the pump rod 7 so that the oscillation of the lever will effect a vertical reciprocation of the clamp and of the pump rod and thereby raise liquid from the well. The upper end of the hanger seats in a recess in the upper edge of the lever and is held therein by a strap 8, as will be readily understood on reference to Figs. 1 and 2. The clamp 6 consists of a body 9 through which the lower ends of the hanger fit tightly, nuts 10 being durable fitted on the ends of the hanger below the body to prevent withdrawal of the hanger. Spaced ears 11 project from the ends of the body and a lever 12 is pivoted between the ears of one set while between the ears of the other set is pivotedl a latch bolt 13 adapted to pass through the forked end 40 of the lever, a nut 41 being mounted on the end of the bolt yto be turned home against the lever and hold it to the body of the clamp. In the face of the body opposed to the lever isa notch 42 and a removable jaw 43 is fitted over each wall of said notch and over the opposed face of the lever whereby, when the lever is locked to the body, the pump rod disposed between said jaws will be securely clamped and consequently caused to follow the movements of the hanger. If the jaws be removed, the lever and body may be clamped about a pump casing, or other member, when the withdrawal of the same from the well is necessary or desirable. In such event, the hanger is removed from t'he or other lifting mechanism.

The lever 4 is pivoted upon the frame 2 by a fulcrum bolt 14 inserted through the frame standard and through any one of series of eyes or loops 15 on the lever where by the stroke of the lever may be regulated. f

Above the lever 4 is a lever 17 which is fulcrumed upon the other standard of the frame by a fulcrum bolt 18 inserted through the said standard and one of the eyes or loops 19 on the lever. Therear ends of the levers 4 and 17 areprovided with. longitudinal series of openings 21 and a link 22 serves to connect the said rear ends of the levers, the ends of the link being attached to the respective levers by pivot bolts 23 inserted through the ends of the link and through. the proper openings 21, as will be readily understood.

In the arrangement shown in Fig. 1, a pitman 24 is adjustably pivoted at its upper end to the front end of the upper lever 17, and this pitman consists of similar straps receiving the end of the said lever between them and having their lower ends pivoted to the front end of an arm 25 projecting forwardly from and secured to a vertically disposed rocking arm or lever 26 which is fulcrumed upon brackets or rails 27 secured upon the base or platform 1. Aspacer block 28 is secured between the men'lbers of the pit man 24 between the levers 4 and 17 so that binding of the pitman members against either lever will be prevented. Movably connected with the upper end ot the rocking arm or lever 26 is a driving rod 29 which may be connected at its rear end with any convenient operating mechanism, as a pulley 30 driven from a distant motor. The arrangement shown in Fig. 1 is especially adapted for use in connection with oil wells, as will be readily understood. Then the device is to be opel# ated by a windmill, the pitman 24 and the operating lever 26 with the parts cosoperating therewith are removed and the driving rod 31 from the windmill .is pivotally attached at its lower end to the front end of the upper lever 17, as shown in Fig. 2.

Around the fulcrum bolts 14 and 18, I provide a plurality ot anti-friction rollers 32 and the eye 15 or 19, as the case may be, is large enough to accommodate the said rollers so that rictional resistance will be minimized and the levers may oscillate freely and easily.

It will be readily understood that the vertical reciprocation oi: the windmill rod 31 will cause the lever 17 to oscillate about its Yulcrum, and this oscillation will be transmitted through the coupling link 22 to the lever 4 which, in turn, will ei'lect vertical re ci procation of the clamp 6 and the pump rod 7 to which it is secured. lVhen the device is to be operated by an engine or with an ordinary oil wel] rig as in Fig. 1, the power is applied through the driving rod 29 so as to oscillate the lever 26 and this oscillation will be transmitted through the arm 25 and the pitman 24 to the lever 17, aswill be readily understood. From the lever 17, the power will be transmitted to the pump rod in the manner previously stated. It, for any reason, the windmill or the engine cannot be utilized as a source of power, the coupling link 22 may be detached from the lower lever 4 and said lever then oscillated by hand so as to raise liquid through the pump.

It will be readily noted that I have provided a very simple and compact mechanism and vthe power applied. to the same will be very advantageously utilized inasmuch as the levers 4 and 17 will operate with very little resistance and will apply the force to the pump rod in such a manner that a very slight expenditure of energy will etfectually operate the pump. The stroke ot the levers may be adjusted within a c0nsiderable range by shifting the ulcrum bolts and the coupling link 22 so that the pump may be operated positively and easily even when the windmill is exposed to only a very light breeze or when the engine connected with the j ack is very small and of low horse power. It is to be understood that the device is intended particularly for operatingr deep well pumps, the oil or water being car ried through a discharge pipe to a tank or reservoir.

Having thus described the invention, what is claimed as new is:

1. A pump jack comprising standards connected at their upper ends, an upper lever fulcrumed upon the rear standard, a second lever fulcrumed upon the trout standard below the first lever, means carried by the front end of the second lever to secure a pump rod, a coupling link adjustably counecting the rear ends of the two levers, and

means for applying power to the front end of the upper lever.

2, A pump jack comprising a supportingl frame, an upstanding lever mounted for rocking movement on the base ot the trame, means for applying power to the upper end of said lever, an arm projecting forwardly from said lever, a lever adjustably 'fulcrumed upon the trame near the upper end thereof, a pitman connecting the ltrent end of said lever with the front end of said arm, a third lever fulcrumed upon the frame below the second-mentioned lever and in a vertical plane in advance of thevertical plane of the fulcrum of said second-mentioned lever, a pump rod clamp carried by the front end of the third lever, and a coupling link connecting' the rear ends olf the second and third levers.

In testimony whereof I afiix my signature.

EDVARD 1V. GROGAN. [1.. s] 

